Non-contact Heat-not-burn Heating Device

ABSTRACT

A non-contact heat-not-burn heating device includes a ceramic heating element and a smoking product bearing assembly. The ceramic heating element includes a heating body and a heating circuit, the heating body is cylindrical and internally provided with a porous channel, and the heating circuit is arranged on the heating body to heat air passing through the porous channel. The smoking product bearing assembly includes a preheating tube and a blocking piece, the blocking piece is arranged in a cavity defined by the preheating tube to divide the cavity into a first cavity and a second cavity, the first cavity is used for placing the smoking product and preheating the smoking product, and the second cavity is used for placing at least one part of the ceramic heating element. At least one part of the ceramic heating element is arranged in the cavity defined by the preheating tube.

CROSS REFERENCE TO THE RELATED APPLICATIONS

This application is a continuation application of InternationalApplication No. PCT/CN2020/090253, filed on May 14, 2020, which is basedupon and claims priority to the Chinese Patent Application No.201920703370.X, filed on May 16, 2019, the Chinese Patent ApplicationNo. 201921496320.5, filed on Sep. 10, 2019, the Chinese PatentApplication No. 201910851072.X, filed on Sep. 10, 2019, the ChinesePatent Application No. 201921496452.8, filed on Sep. 10, 2019, and theChinese Patent Application No. 201921496300.8, filed on Sep. 10, 2019,the entire contents of which are incorporated herein by reference.

TECHNICAL FIELD

The present invention relates to the technical field of heat-not-burnproducts, and in particular to a non-contact heat-not-burn heatingdevice.

BACKGROUND

Smoking products such as cigarettes and cigars produce smoke by burningtobaccos during use, while the smoke produced by burning of the tobaccoscontains many harmful substances, like tar, and inhalation of theseharmful substances for a long term will cause great harm to the humanbody. With the progress of science and technology and continuous pursuitof a healthy life by people, a cigarette substitute, namely aheat-not-burn product, has emerged. Among them, a typical heat-not-burnscheme is to release effective substances in the smoking products in theheat-not-burn mode, like nicotine.

The heat-not-burn product mainly uses a working principle oflow-temperature heating to heat the smoking products to about 300° C.,thereby baking out effective ingredients like the nicotine in thesmoking products. Because the burning temperature is not reached, theharmful substances like the tar in the smoking products are greatlyreduced.

In the related art, the heat-not-burn product generally adopts a contactheating scheme to bake the smoking products, for example, a sword-shapedneedle-shaped heating element is inserted into the smoking products forheating. However, the contact heating scheme has the shortcoming ofuneven heating, that is, the part in direct contact with the heatingelement has a higher temperature, while the part far away from theheating element has rapid temperature decrease. Therefore, only the partof the tobacco close to the heating element can be completely baked,leading to the fact that the cut tobacco in the smoking products cannotbe completely baked, and not only the cut tobacco is wasted, but alsothe smoke volume is wasted. If the baking efficiency is improved byincreasing the temperature of the heating element, the cut tobaccoaround the heating element can be easily burnt, which not only affectsthe taste, but even leads to a large increase in the harmful ingredientsand affects physical health.

SUMMARY

The present invention is made based on knowledge and research of theinventor on the following issues:

In the working process of a heat-not-burn product, due to the fact thatthe contact heating scheme has the shortcoming of uneven heating, thesmoking products cannot be completely baked, and not only the cuttobacco is wasted greatly, but also the smoke volume is insufficient.

For this purpose, after a lot of research and experiments, the inventorfinds that the smoking process itself is an air flow process. If the airflowing into the smoking products has the higher temperature, the hotair can play a direct role in baking the smoking products. Since the hotair can penetrate and bake all the tobacco of the smoking products withthe smoking process, the problem of uneven heating can be effectivelysolved. Therefore, the smoking product is baked by heating the air andthen using the hot air flow during the smoking process to achieveheating, and this scheme can achieve good overall heating effect.

The present invention aims to solve one of the technical problems in theabove art at least to some extent. For this purpose, an objective of thepresent invention is to provide a non-contact heat-not-burn heatingdevice, wherein at least one part of a ceramic heating element isarranged in a cavity defined by a preheating tube, which can achieve theeffect of preheating the cavity, improves the heating efficiency andmakes the heated flow air bake the smoking product evenly to avoid cuttobacco waste of the smoking product and improve the smoke volume.

To achieve the foregoing objective, an embodiment of the presentinvention provides a non-contact heat-not-burn heating device whichcomprises a ceramic heating element and a smoking product bearingassembly, wherein the ceramic heating element comprises a heating bodyand a heating circuit, the heating body is cylindrical and internallyprovided with a porous channel, and the heating circuit is arranged onthe heating body to heat the air passing through the porous channel; andthe smoking product bearing assembly comprises a preheating tube and ablocking piece, the blocking piece is arranged in a cavity defined bythe preheating tube to divide the cavity into a first cavity and asecond cavity, the first cavity is used for placing the smoking productand preheating the smoking product, and the second cavity is used forplacing at least one part of the ceramic heating element.

According to the non-contact heat-not-burn heating device of theembodiment of the present invention, the ceramic heating element ismatched with the smoking product bearing assembly, at least one part ofthe ceramic heating element is arranged in the cavity defined by thepreheating tube, which can achieve the effect of preheating the cavity,improves the heating efficiency and makes the heated flow air bake thesmoking product evenly to avoid cut tobacco waste of the smoking productand improve the smoke volume. Meanwhile, due to the fact that theceramic heating element adopts the high-purity aluminum oxide ceramicswhich have high compactness and almost have no pores in the microstructure, pollutants in fluids cannot enter the ceramic heating elementand thus cannot leave pollution or peculiar smell on the surface.Further, because the smoking product bearing assembly separates thesmoking product from the ceramic heating element completely, non-contactair heating is completely achieved to ensure that the product is notpolluted. In addition, the ceramic heating element adopts the porousarrangement, so that the specific surface area of the honeycomb ceramicbody is large enough to achieve sufficient heating of the air. Not onlythe heating efficiency is high, but also the ceramic heating body hashigh thermal conductivity, so that the aim of heating the air can beachieved more quickly. Further, the air flow speed is limited to someextent due to the structure of the porous channel, the contact timebetween the hot air and the smoking product is longer during baking ofthe smoking product, the heat loss is reduced, and the energy is saved.Moreover, when no smoking action is performed, the hot air can be lockedby means of the porous shape of the ceramic heating body, which reducesouter flow of the hot air and further saves the energy. In addition, thesmoking product placed in the cavity is separated from the ceramicheating element through the blocking piece, which prevents the ceramicheating element from being in direct contact with the smoking product orbeing too close to the smoking product to further prevent the part ofthe smoking product close to the ceramic heating element from beingheated to be over 320° C. and burnt. Further, due to the fact that thepreheating tube has the preheating effect, and at least one part of theceramic heating element is arranged in the cavity, the hot air heated bythe ceramic heating element bakes the smoking product effectively, thebaking efficiency is high, and the smoke volume is further improved.

Moreover, the non-contact heat-not-burn heating device providedaccording to the above embodiment of the present invention can furtherhave the following additional technical characteristics:

Further, the heating body is a cylinder, and the porous channel isarranged in the heating body in the axial direction.

Specifically, through holes of the porous channel are round holes orpolygonal holes.

Specifically, the through holes of the porous channel are regularlydistributed in the heating body.

Wherein, the hole diameter of the through holes can be 0.1-2 mm, and thedistance between two adjacent through holes can be 0.1-0.5 mm.

Optionally, the heating circuit is printed on the outer surface of theheating body in the thick film circuit mode.

Optionally, the blocking piece is a flow deflector located in the cavityalong the wall of the preheating tube, and the flow deflector isprovided with a plurality of deflector holes.

Wherein, the plurality of deflector holes are evenly distributed in theperipheral direction.

Optionally, the deflector holes are round holes with the hole diameterof 0.1-2 mm.

Optionally, the blocking piece forms a step surface extending along thewall of the preheating tube to the center.

Specifically, two blocking pieces are provided, and the two blockingpieces are arranged oppositely.

Optionally, the preheating tube is a ceramic tube.

When the preheating tube adopts the ceramic tube, due to the fact thatthe ceramic tube has high surface compactness, adsorption of the smokeparticles can be effectively prevented, and the effect of preventingpeculiar smell can be further achieved.

Further, the heating body and the ceramic tube are both made of aluminumoxide ceramics, aluminum nitride ceramics, silicon nitride ceramics,silicon carbide ceramics, beryllium oxide ceramics or zirconium oxideceramics.

Specifically, the aluminum oxide content in the aluminum oxide ceramicsis greater than 99%, and the density of the aluminum oxide ceramics isnot less than 3.86 g/cm³.

Optionally, the non-contact heat-not-burn heating device furthercomprises a sealing sleeve, the sealing sleeve is arranged in the hollowmode to sleeve the smoking product bearing assembly inside, and thebottom of the sealing sleeve extends out in the axial direction to forma condensation cavity.

The condensation cavity arranged at the bottom of the sealing sleeve canbe used for condensation and sedimentation of trace tar produced bybaking of the smoking product to further reduce tar residue on theceramic heating element and the ceramic tube and effectively avoidpeculiar smell of the ceramic heating element and the ceramic tube.

Optionally, the sealing sleeve is a glass tube, and the preset distanceis kept between the bottom of the glass tube and the ceramic heatingelement.

Specifically, the bottom of the sealing sleeve is provided with adetachable protective net cover.

Further, the non-contact heat-not-burn heating device further comprisesan adsorbate, and the adsorbate is arranged in the condensation cavityto adsorb the tar produced during heating of the smoking product.

Wherein, the adsorbate is cellular.

Optionally, the adsorbate is made of gangue.

Optionally, the non-contact heat-not-burn heating device furthercomprises a sealing sleeve, the sealing sleeve is arranged in the hollowmode to sleeve the smoking product bearing assembly inside, the innerdiameter of the sealing sleeve is greater than the outer diameter of thesmoking product bearing assembly, and the sealing sleeve and the smokingproduct bearing assembly are fixed in the point contact mode.

Wherein, the sealing sleeve and the smoking product bearing assembly arefixed in the point contact mode, which can greatly reduce transmissionof the heat to the sealing sleeve to avoid heat loss, improve the heatutilization ratio accordingly, save energy and improve the heatingeffect.

Optionally, the sealing sleeve and the smoking product bearing assemblyare subjected to point contact fixing by adopting a heat insulationadhesive.

The heat transmission efficiency can be further reduced by adopting theheat insulation adhesive to perform point contact fixing.

Optionally, the sealing sleeve comprises a first glass tube and a secondglass tube, the inner diameter of the first glass tube is greater thanthe outer diameter of the second glass tube to sleeve the second glasstube, and the second glass tube and the first glass tube are fixed inthe point contact mode.

Wherein, the position of point contact between the second glass tube andthe smoking product bearing assembly is located on the upper portion ofthe second glass tube, and the position of point contact between thesecond glass tube and the first glass tube is located on the lowerportion of the second glass tube.

In addition, the embodiment of the present invention further provides anon-contact air heating type heat-not-burn heating device whichcomprises a heating assembly, a sealing sleeve and a heat recoverydevice, wherein the side wall of the heat recovery device is internallyprovided with a first cellular porous channel, and the first cellularporous channel divides the heat recovery device into an outer wall andan inner wall; the inner wall of the heat recovery device is providedwith the sealing sleeve, the sealing sleeve is internally provided withthe heating assembly in the sleeve mode, and the heating assembly isconnected to the heat recovery device through the sealing sleeve; theheating assembly is internally provided with a heating body; and theheating body is provided with a heating circuit, the endpoints of theheating circuit are provided with wires, and the heating body isinternally provided with a second cellular porous channel.

Further, the heating assembly is provided with a preheating tube, a flowdeflector and a heating element sequentially from top to bottom, whereinthe flow deflector is provided with a plurality of deflector holes.

Further, the heating assembly and the heat recovery device are both madeof the high-purity aluminum oxide ceramics with the density not lessthan 3.86 g/cm³.

Further, the first cellular porous channel and the second cellularporous channel are provided with square holes or other polygonal holesevenly distributed, the hole diameter range is 0.1-2 mm, and the minimumdistance between two adjacent holes is 0.1-0.5 mm.

Further, printing materials of the heating circuit comprise but notlimited to silver, tungsten and MoMn (molybdenum manganese).

Further, materials of the wires comprise but not limited to silver,copper and nickel.

The non-contact air heating type heat-not-burn heating device of theembodiment of the present invention heats the air through the heatingassembly to make the heated flow air bake the tobacco evenly and improvethe smoke volume. Meanwhile, due to the fact that the heating assemblyand the heat recovery device both adopt the high-purity aluminum oxideceramics which have high compactness and almost have no pores in themicro structure, the pollutants in the fluids cannot enter the ceramicsand cannot leave pollution or peculiar smell on the surface. Further,due to the air heating mode, no contact with a cartridge ensures thatthe device is not polluted.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a structure diagram of a non-contact air heating typeheat-not-burn heating device of embodiment of the present invention.

FIG. 2 is a schematic diagram of a ceramic heating element of anembodiment of the present invention.

FIG. 3 is a schematic diagram of a flow deflector of an embodiment ofthe present invention.

FIG. 4 is a schematic diagram of a heat recovery device of an embodimentof the present invention.

FIG. 5 is a structure diagram of a smoking product bearing assembly ofan embodiment of the present invention.

FIG. 6 is a structure diagram of a non-contact heat-not-burn heatingdevice of an embodiment of the present invention.

FIG. 7 is a structure diagram of a non-contact air heating typeheat-not-burn heating device of another embodiment of the presentinvention.

FIG. 8 is a structure diagram of a non-contact air heating typeheat-not-burn heating device of another embodiment of the presentinvention.

FIG. 9 is a section view of a non-contact air heating type heat-not-burnheating device of an embodiment of the present invention.

FIG. 10 is an explosion diagram of a non-contact air heating typeheat-not-burn heating device of an embodiment of the present invention.

DETAILED DESCRIPTION OF THE EMBODIMENTS

The embodiments of the invention will be described in detail below,examples of the embodiments are shown in drawings, wherein same orsimilar mark numbers indicate identical or similar components orcomponents having same or similar functions. The embodiments describedwith reference to the drawings below are illustrative and intended toexplain the present invention and cannot be construed as limiting thepresent invention.

In order to better understand the above technical scheme, theillustrative embodiments of the present invention are described in moredetail with reference to the drawings below. Although the drawings showthe illustrative embodiments of the present invention, it should beunderstood that the present invention can be achieved in various formswithout being limited by the embodiments illustrated. On the contrary,these embodiments are provided to understand the present invention morethoroughly, and can convey the scope of the present invention to thoseskilled in the art completely.

In order to better understand the above technical scheme, the abovetechnical scheme will be described in detail in combination with thespecification drawings and the specific embodiments below.

First, after a lot of research and experiments, the inventor of thepresent invention finds that the heating scheme of heating the air andutilizing the hot air to bake the smoking product in the smoking processis better in heating effect on the whole.

However, when the air heating scheme is adopted, first it is necessaryto select a suitable heating element to heat the air, and when theheating element heats the air, room temperature air needs to enter theheating element, and the temperature of air should reach 300° C. orabove after flowing out of the heating element; second, some generalsmoking habits have to be considered, that is, about 20 ml per secondmust be ensured during temperature rise, and each puff lasts for about 3seconds, and the heating element needs a total heating efficiency ofabout 60 ml air.

To achieve the above effect, the inventor has learned through a lot ofexperiments that when a heating wire is used to heat the air, theheating wire should have high temperature, and only when the temperatureof the heating wire is up to 600° C. or above, it can heat the airflowing through to more than 300° C., and the heating wire will coolquickly as long as air flows by, in this way, each puff of smoking willmake the temperature of the heating wire drop by 200-300° C. Therefore,the heating wire needs power compensation during smoking, otherwise itmay be difficult to guarantee air heating required for smoking; while,power compensation is performed for the heating wire based on the airflow detected by an air flow sensor, due to small contact area betweenheating wire and air, this power compensation scheme not only needs highpower to achieve the required heating effect, but also has the problemof inaccurate gas temperature after heating, untimely compensationresponse, which may cause uneven temperature in all directions.

In addition, when the flow air is heated to above 300° C. by increasingthe temperature of a heater strip, metal ions separated from the heaterstrip may be mixed into the smoking airflow and enter the human body todo harm to the body health due to temperature increase of the heaterstrip and direct contact of the heater strip with the air.

For the above, the inventor of the present invention has concludedthrough a lot of research that when air heating is used to bake asmoking product, the heating element used to heat the air needs to havea large heating area so as to reduce the temperature difference betweenthe heating element and the air; the heating element also needs highheat capacity to resist against the temperature drop caused after thesmoking airflow passes, and high thermal conductivity to reduce theheating preparation time.

For this purpose, the applicant finds based on in-depth research onceramics for years that a larger heating surface area can be obtained bydesigning a porous structure of the honeycomb ceramics, so that theheating element will have a high air heating efficiency, and thehoneycomb ceramic heating element of porous structure is closer to asolid structure and has a higher heat capacity than a ceramic tube ofthe same size; in addition, the thermal conductivity of alumina materialis greater than 30 W/MK, which can make the heat conduction faster andmore uniformly, thereby obtaining high thermal conductivity. Therefore,the honeycomb ceramic heating element of porous structure can meet therequirement of baking the smoking product by heating air.

A non-contact heat-not-burn heating device of the embodiment of thepresent invention is described below with reference to the drawings.

As shown in FIG. 1, FIG. 6 and FIG. 7, the non-contact heat-not-burnheating device provided by the embodiment of the present inventioncomprises a ceramic heating element 10 and a smoking product bearingassembly 20.

Further, as shown in FIG. 1 and FIG. 2, the ceramic heating element 10comprises a heating body 11 and a heating circuit 12.

Wherein, the heating body 11 is cylindrical, and the heating body 11 isinternally provided with a porous channel 101; and the heating circuit12 is arranged on the heating body 11 to heat air passing through theporous channel 101.

That is, the heating circuit 12 performs heating work after powered onto heat the air passing through the porous channel 101 to achieve thefunction of even heating of the air.

Optionally, the heating body 11 can be cylindrical and can also be inthe shape of a polygonal cylinder, such as in the shape of a prism, asquare column, and a pentagonal column. This is not specifically limitedin the present invention.

In an embodiment, as shown in FIG. 2, the heating body 11 is a cylinder,and the porous channel 101 is arranged in the heating body 11 in theaxial direction.

In addition, as shown in FIG. 2, the heating circuit 12 is printed onthe outer surface of the heating body 11 in the thick film circuit mode.For example, the heating circuit encircles the outer surface of theheating body 11 in the heating coil mode and is integrated with theheating body 11.

According to an embodiment of the present invention, printing materialsof the heating circuit 12 comprise silver, tungsten or molybdenummanganese.

Specifically, the outer wall of the cylindrical cellular ceramic heatingbody is printed with the heating silver paste thick film heating circuitfor heating. Due to the fact that the ceramic heating body 11 adopts theporous cellular structure, the heating surface area of the heatingelement can be greatly increased. According to experiments, the useronly needs to heat the heating body 11 to about 380° C. to heat the airto above 300° C. Because the ceramic heating body 11 has higher heatcapacity, after each smoking airflow (for example, 50 ml air) passesthrough the ceramic heating element, temperature decrease is small, only20-30° C.

When the heating circuit 12 is printed on the outer surface of theheating body 11 in the thick film circuit mode, its heating resistor isgenerally a PTC thermistor, that is, the resistance increases when thetemperature rises. According to multiple temperature increase anddecrease experiments, the temperature of the ceramic heating elementcorresponds to the resistance, so that the temperature of the ceramicheating element can be represented by measuring the resistance. Thus,the temperature of the heating element can be pulled back to theoriginal temperature within several seconds by utilizing theself-compensation effect (the heating element is cooled, the resistancedecreases, the current increases, and the power increases) of the thickfilm heating circuit under constant voltage supply of a DC power supply,and the temperature of the heating element can be kept stable withoutfluctuations when there is no airflow.

Therefore, in the embodiment of the present invention, due to thecellular structure of the heating body 11, the ceramic heating elementcan provide sufficient heat capacity, so that the temperature effect ofthe airflow on the heating element is very small in the simulatedsmoking process, no power compensation is required, and the effect ofthe heating air for cigarette smoking can be achieved byself-regulation.

In addition, the heating circuit 12 printed on the heating body 11 inthe thick film circuit mode has a clear temperature-sensitive effect.The resistance increases with increase of the temperature and decreaseswith decrease of the temperature, the heating circuit can be used as asensor, so no temperature sensor is required to control the temperatureof the heating element.

To sum up, the ceramic heating element of the embodiment of the presentinvention does not need to perform dynamic power compensation based onan airflow sensor, nor does it need to detect or control the temperaturebased on a temperature sensor, which not only simplifies the complexityof a control system, but also achieves a better control response effect.

Optionally, according to an embodiment of the present invention, throughholes of the porous channel 101 are round holes or polygonal holes.

In addition, in an embodiment, the through holes of the porous channel101 are regularly distributed in the heating body 11, for example, asshown in FIG. 2.

Optionally, when the heating body 11 is a cylinder, the through holes ofthe porous channel 101 can be evenly distributed in the peripheraldirection. Or, as shown in FIG. 2, when the through holes of the porouschannel 101 are polygonal holes, the through holes can be distributed inthe cylinder in central symmetry.

Understandably, in the embodiment of the present invention, thedistribution of the through holes of the porous channel 101 may not belimited, as long as the porous cellular structure of the heating body 11is limited.

Specifically, in an embodiment of the present invention, the holediameter of the through holes of the porous channel 101 is 0.1-2 mm, forexample, 0.5 mm and 1 mm; and the distance between two adjacent throughholes is 0.1-0.5 mm, for example, 0.2 mm and 0.4 mm. Understandably, thehole diameter of the through holes of the porous channel 101 and thedistance between two adjacent through holes can be limited according tothe specific circumstances of the heating body 11, as long asventilation can be performed to increase the contact area between theair and the surface.

Optionally, according to an embodiment of the present invention, theheating body 11 is made of aluminum oxide ceramics, aluminum nitrideceramics, silicon nitride ceramics, silicon carbide ceramics, berylliumoxide ceramics or zirconium oxide ceramics.

Wherein, the aluminum oxide content in the aluminum oxide ceramics isgreater than 99%, and the density of the aluminum oxide ceramics is notless than 3.86 g/cm³.

Specifically, in an example, as shown in FIG. 2, the ceramic heatingelement comprises the cellular heating body 11 made of the aluminumoxide ceramics, the heating circuit 12 and wires 13. Wherein, the centerof the cellular heating body 11 is provided with the porous channel 101,the porous channel 101 is provided with square holes evenly distributed,the heating circuit 12 is arranged on the outer surface of the heatingbody 11 in the encircling mode, and the head end and the tail end of theheating circuit 12 are provided with the wires 13.

In addition, the density of the aluminum oxide ceramics of the heatingbody 11 is 3.9 g/cm³, and the resistance of the heating body 11 can be0.1-2 Ω, for example, 0.6 Ω and 0.8 Ω; the hole diameter of the squareholes of the porous channel 101 can be 1.5 mm, that is, the side lengthof the square holes is 1.5 mm; and the wall thickness of the porouschannel 101 can be 0.2 mm, as shown in FIG. 2, the distance betweencorresponding sides of two adjacent square holes is the wall thicknessof the porous channel 101.

Further, the material of the heating circuit 12 can be silver. Wherein,the printing thickness of the heating circuit 2 is 0.01-0.02 mm, thewires 13 can be silver wires, and the diameter is 0.2 mm.

In the embodiment of the present invention, the purity of the aluminumoxide ceramics for making the heating body 11 is greater than 99%, thatis, the ceramics are high-purity aluminum oxide ceramics, the cellularceramic surface has very high compactness, adsorption of the smokeparticles can be effectively prevented, and the effect of preventingpeculiar smell can be achieved. The cellular heating body made of thehigh-purity aluminum oxide ceramics has good thermal conductivity, up to33 W/MK. The wall thickness and the hole diameter are both very small inthe structure of the cellular ceramic heating element, and the heatconduction effect is extremely good. Meanwhile, the contact area withthe air can be greatly increased by means of the cellular shape, so thatthe specific surface area of the honeycomb aluminum oxide ceramics islarge, the heating efficiency is high, and the aim of heating the aircan be achieved more quickly. In this way, the cellular ceramic heatingelement of the embodiment of the present invention is arranged under asmoking product to be baked and not in direct contact with the smokingproduct to be baked. When a user smokes the smoking product, the airflows through the through holes of the heating element honeycomb to beheated to the specific temperature, then the smoking product is quicklyheated to about 320° C. when the hot air flows through the smokingproduct, the heating area and the heating efficiency of the smokingproduct are greatly improved, the heating is more even, the cut tobaccois carbonized more completely, cut tobacco waste is avoided, the tasteof the user is improved, the smoke volume is sufficient, and the effectis not limited by the variety of the smoking product. Further, the airflow speed is limited to some extent due to the structure of the poroushoneycomb, the contact time between the hot air and the smoking productis longer, heat loss is reduced, and energy is saved. When there is nosmoking action, the porous honeycomb ceramic can lock the hot air whilereducing the outflow of hot air, which will further save energy.

To sum up, according to the ceramic heating element of the embodiment ofthe present invention, the heating body is internally provided with theporous channel, so that the contact area between the heating body andthe air can be increased when the air passing through the porous channelis heated by the heating circuit, which makes the specific surface areaof the honeycomb ceramic body large and achieves sufficient heating ofthe air. Not only the heating efficiency is high, but also the ceramicheating body has high thermal conductivity, so that the aim of heatingthe air can be achieved more quickly. Further, the air flow speed islimited to some extent due to the structure of the porous channel, thecontact time between the hot air and a smoking product is longer duringbaking of the smoking product, heat loss is reduced, and energy issaved. Moreover, when no smoking action is performed, the hot air can belocked by means of the porous shape of the ceramic heating body, whichreduces outer flow of the hot air and further saves the energy. Inaddition, due to the fact that the ceramic heating body has high surfacecompactness, adsorption of the smoke particles can be effectivelyprevented, and the effect of preventing peculiar smell can be achieved.

Based on deep research on the ceramic heating element and the smokingproduct bearing assembly, the inventor of the present invention findsthat, in the smoking product of the current common heat-not-burnproduct, the carbonization temperature of cigarette paper wrappedoutside is less than that of the cut tobacco inside; and when thetemperature of the cigarette paper wrapped outside the smoking productexceeds 240° C., there will be burnt smell, while the cut tobacco insideneeds to be baked at about 330° C. to emit smoke effectively. In thisregard, the problem that the tobacco paper will be over-baked before thecut tobacco is heated to the ideal temperature needs to be resolved.Further, the inventor finds through experiments that better useexperiences will be achieved during actual smoking if the entire smokingproduct has the ideal preparation temperature, like 200-220° C.

For this purpose, when the heat-not-burn heating device scheme where thesmoking product is not in direct contact with the ceramic heatingelement is adopted, the smoking product bearing assembly is required toprovide the preparation temperature of 200-220° C. Therefore, a bearingpart for placing the smoking product, that is, a preheating tube, needsto have a preheating function. In order to prevent the smoking productfrom being in direct contact with the ceramic heating element, ablocking piece needs to be arranged at the bottom of the preheating tubeor in the defined cavity to achieve the effect of position limiting.According to repeated experiments, the blocking piece can not onlyeffectively separate the smoking product from the ceramic heatingelement, but also achieve the effect that tobacco tar precipitategenerated during the smoking process of the smoking product will notcondense on the ceramic heating element and the blocking piece, repeatedsmoking achieves the self-cleaning effect naturally, no peculiar smellis left, no frequent cleaning is required, and high use value can beachieved.

In terms of the heating effect, according to many experiments, thealuminum oxide ceramic tube can serve as a smoking product container,can not only effectively provide the ideal preparation temperature forthe smoking product through the high thermal conductivity of thealuminum oxide material, but also achieve the effect that no tobacco tarresidue is left due to compactness of the material of the aluminum oxideceramic tube, and peculiar smell caused by continuous use is avoided.

In addition, in order to increase the heating rate, when the ceramicheating element is controlled to perform heating work, the non-contactheat-not-burn heating device of the embodiment of the present inventionadopts the heating strategy of adopting high-power pulling up in theinitial stage and maintaining the working temperature at low power afterreaching the working temperature. Due to the temperature transferprocess, the smoking product and the smoking product bearing assemblyhave not reached the corresponding temperature except for the ceramicheating element that has reached the working temperature. Therefore,while the ceramic heating element is controlled to maintain the workingtemperature by low-power heating, the voltage cannot be directly reducedto the voltage in the thermal insulation stage but needs to be slowlyreduced.

Therefore, when the ceramic heating element is controlled to enter thethermal insulation stage, the voltage reduction process needs to becompleted in multiple stages. For example, two-stage voltage reductionis required. In the first stage, the voltage is quickly reduced; in thesecond stage, the voltage needs to be slowly reduced to thecorresponding voltage in the thermal insulation stage to enter thethermal insulation stage maintaining the working temperature. Becausethe power is much higher than the heat balance power in order to raisethe temperature quickly in the early stage. If the voltage reduction istoo slow, the temperature of the smoking product can exceed 330° C.easily when the user smokes the smoking product continuously after thefirst smoking action, leading to scorching of the smoking product.Therefore, the control process of first reducing the voltage quickly andthen reducing the voltage slowly can avoid the situation effectively.

Therefore, as shown in FIG. 1 to FIG. 7, the smoking product bearingassembly 20 comprises a preheating tube 21 and a blocking piece 22.

As shown in FIG. 6, the blocking piece 22 is arranged in a cavitydefined by the preheating tube 21 to divide the cavity into a firstcavity and a second cavity, the first cavity is used for placing thesmoking product and preheating the smoking product, and the secondcavity is used for placing at least one part of the ceramic heatingelement 10.

That is to say, the blocking piece 22 is arranged in the cavity definedby the preheating tube 21 to divide the cavity into two parts, one partis used for placing the smoking product, and the other part is used forcontaining at least one part of the ceramic heating element 10.

Optionally, as shown in FIG. 1, FIG. 3 and FIG. 5, the blocking piece 22can be a flow deflector located in the cavity along the wall of thepreheating tube 21, and the flow deflector is provided with a pluralityof deflector holes 202.

Further, as shown in FIG. 1 or FIG. 3, the plurality of deflector holes202 are evenly distributed in the peripheral direction.

Specifically, in an example, as shown in FIG. 1 or FIG. 3, the deflectorholes 202 are round holes with the hole diameter of 0.1-2 mm.

In this way, when the ceramic heating element 10 performs heating work,the flow deflector separates the ceramic heating element 10 from thesmoking product, which can effectively prevent the ceramic heatingelement 10 from being in direct contact with the smoking product orbeing too close to the smoking product to further prevent the part ofthe smoking product close the ceramic heating element from being heatedto be over 320° C. and burnt. Further, when a user smokes the smokingproduct, the hot air can flow into the first cavity quickly through hotair through holes, that is, the deflector holes 202 to bake the smokingproduct evenly and quickly.

Optionally, in another embodiment, as shown in FIG. 6, the blockingpiece 22 forms a step surface extending along the wall of the preheatingtube 21 to the center.

Specifically, as shown in FIG. 6, two blocking pieces 22 can beprovided, and the two blocking pieces 22 are arranged oppositely toseparate the ceramic heating element 10 from the smoking product in thecavity effectively and further effectively prevent the ceramic heatingelement 10 from being in direct contact with the smoking product orbeing too close to the smoking product to further prevent the part ofthe smoking product close to the ceramic heating element from beingheated to be over 320° C. and burnt. Further, when the user smokes thesmoking product, the hot air can flow quickly through the gap betweenthe two blocking pieces to bake the smoking product evenly and quickly.

Optionally, in an embodiment, the preheating tube 21 can be the ceramictube, wherein the ceramic tube is made of the aluminum oxide ceramics,the aluminum nitride ceramics, the silicon nitride ceramics, the siliconcarbide ceramics, the beryllium oxide ceramics or the zirconium oxideceramics.

Optionally, the flow deflector can also be made of the aluminum oxideceramics, the aluminum nitride ceramics, the silicon nitride ceramics,the silicon carbide ceramics, the beryllium oxide ceramics or thezirconium oxide ceramics.

Further, the aluminum oxide content in the aluminum oxide ceramics isgreater than 99%, and the density of the aluminum oxide ceramics is notless than 3.86 g/cm³.

In this way, when the ceramic heating element 10 performs heating work,because the flow deflector and the ceramic tube are both made of thehigh-purity aluminum oxide ceramics which can be quickly heated toachieve the effect of preheating the cavity, the heating efficiency canbe improved, and even quick baking of the smoking product can befacilitated.

Further, in the embodiment of the present invention, the purity of thealuminum oxide ceramics is greater than 99%, so that the ceramic surfacehas very high compactness, adsorption of the smoke particles can beeffectively prevented, and the effect of preventing peculiar smell canbe achieved. Further, the aluminum oxide ceramics have good thermalconductivity, up to 33W/1ViK, so that the heating efficiency is high,and air temperature rise in the cavity can be achieved more quickly.

Meanwhile, the aluminum oxide ceramic tube 21 does not serve as aheating component, which can reduce the heat loss. In addition, on onehand, the hot air through holes adopted can facilitate circulation ofhot air; on the other hand, it also prevents direct diffusion of the hotair when there is no smoking action. The heat insulation effect isachieved.

Optionally, in an embodiment, the wall thickness of the ceramic tubeachieving the preheating effect is 0.1-0.8 mm. Due to the fact that thewall thickness of the ceramic tube is small, when the ceramic heatingelement 10 performs heating work, the heat can be transmitted on theceramic tube easily, and quick preheating can be achieved.

In order to achieve quick preheating of the ceramic tube and improve thepreheating effect, optionally, in another embodiment, the heatingcircuit can be printed on the outer surface of the ceramic tube in thethick film circuit mode; and when the ceramic heating element 10performs heating work, the ceramic tube with the heating circuitperforms heating work simultaneously to achieve the cavity preheatingeffect.

Understandably, in some embodiments of the present invention, as shownin FIG. 7, the ceramic heating element 10 and the smoking productbearing assembly 20 further needs to be installed in a casing 40 of thenon-contact heat-not-burn heating device, one end of the casing isgenerally on the same level with the end of the preheating tube 21 withthe smoking product, certain space is reserved between the other end ofthe casing 40 relative to the end of the ceramic heating element 10 faraway from the blocking piece 22, and a protective net is provided.Wherein, the reserved certain space can achieve the condensation effect.

Further, in an embodiment, the non-contact heat-not-burn heating devicefurther comprises a sealing sleeve 30.

As shown in FIG. 1 and FIG. 8, the sealing sleeve 30 is arranged in thehollow mode to sleeve the smoking product bearing assembly 20 inside,and the bottom of the sealing sleeve 30 extends out in the axialdirection to form a condensation cavity 301.

In the embodiment of the present invention, the condensation cavity 301is arranged at the bottom of the sealing sleeve 30. When the smokingproduct is baked, the condensation cavity 301 can be used forcondensation and sedimentation of trace tar produced by baking of thesmoking product to reduce tar residue on the ceramic heating element andthe ceramic tube and effectively avoid peculiar smell of the ceramicheating element and the ceramic tube.

According to an embodiment of the present invention, the sealing sleeve30 can be a glass tube, the preset distance is kept between the bottomof the glass tube and the ceramic heating element 10, for example, 3-5cm, thus the tar sedimenting in the condensation cavity 301 keep thecertain distance from the ceramic heating element 10 to avoid pollutionof the ceramic heating element 10. Further, the sealing sleeve 30 adoptsthe glass tube, so quick condensation can be achieved, and the glasstube is easy to scrub and brings convenience to a user.

Further, as shown in FIG. 8, the bottom of the sealing sleeve 30 isfurther provided with a detachable protective net cover 302. Theprotective net cover 302 can be removed easily to clean the condensationcavity while achieving the protection effect.

Optionally, according to an embodiment of the present invention, asshown in FIG. 8, the non-contact heat-not-burn heating device furthercomprises an adsorbate 303, and the adsorbate 303 is arranged in thecondensation cavity 301 to adsorb the tar produced during heating of thesmoking product.

The adsorbate 303 is arranged in the condensation cavity 301 to adsorbthe tar produced by baking of the smoking product to further reduce thetar residue on the ceramic heating element and the ceramic tube andeffectively avoid peculiar smell of the ceramic heating element and theceramic tube.

Wherein, in an embodiment, the adsorbate 303 can be cellular to adsorbhazardous substances like the tar.

Specifically, the adsorbate 303 can be made of gangue, and theadsorption effect can be greatly improved by utilizing argillaceouscomposition in the gangue, such as silicon dioxide, ferric oxide andaluminum oxide.

Optionally, as shown in FIG. 1, FIG. 9 and FIG. 10, in an embodiment,the non-contact heat-not-burn heating device further comprises a sealingsleeve 30.

The sealing sleeve 30 is arranged in the hollow mode to sleeve thesmoking product bearing assembly 20 inside, the inner diameter of thesealing sleeve 30 is greater than the outer diameter of the smokingproduct bearing assembly 20, and the sealing sleeve 30 and the smokingproduct bearing assembly 20 are fixed in the point contact mode.

That is to say, the inner diameter of the sealing sleeve 30 is greaterthan the outer diameter of the ceramic tube 21, the sealing sleeve 30and the ceramic tube 21 are fixed in the point contact mode, which cangreatly reduce heat transmission to avoid heat loss, improve the heatutilization ratio and save energy.

Optionally, in an embodiment, as shown in FIG. 9 and FIG. 10, thesealing sleeve 30 and the smoking product bearing assembly 20, that is,the ceramic tube 21, are subjected to point contact fixing by adopting aheat insulation adhesive 311.

The heat insulation adhesive is adopted to perform the point contactfixing. Due to the fact that the thermal conductivity of the heatinsulation adhesive is very low, and the ceramic tube 21 and the sealingsleeve adopts point contact, the heat on the ceramic tube 21 isdifficult to transmit to the sealing sleeve, the heat transmissionefficiency can be further reduced, the heat loss is reduced, and heatingof the sealing sleeve can be avoided.

Optionally, according to an embodiment of the present invention, asshown in FIG. 9 and FIG. 10, the sealing sleeve 30 comprises a firstglass tube 312 and a second glass tube 313, the inner diameter of thefirst glass tube 312 is greater than the outer diameter of the secondglass tube 313 to sleeve the second glass tube 313, and the second glasstube 313 and the first glass tube 312 are fixed in the point contactmode.

By setting the sealing sleeve 30 into the double glass tube inner-sleevemode and fixing the two glass tubes in the point contact mode, the heattransmission to the first glass tube 312 can be further reduced, theheat loss is avoided, the energy is saved, and the heating effect isimproved.

Specifically, as shown in FIG. 9 and FIG. 10, the position of pointcontact between the second glass tube 313 and the smoking productbearing assembly 20 (that is, the ceramic tube 21) is located on theupper portion of the second glass tube 313, and the position of pointcontact between the second glass tube 313 and the first glass tube 312is located on the lower portion of the second glass tube 313.

That is to say, the heat insulation adhesive 311 for the point contactfixing between the second glass tube 313 and the ceramic tube 21 islocated on the upper portions of the second glass tube 313 and theceramic tube 21, and the heat insulation adhesive 311 for the pointcontact fixing between the second glass tube 313 and the first glasstube 312 is located on the lower portions of the second glass tube 313and the first glass tube 312, so that the heat transmission path can beextended, heat transmission to the first glass tube 312 is furtherreduced, the heat loss is avoided, the heat utilization ratio iseffectively improved, and the energy is saved.

According to the non-contact heat-not-burn heating device of theembodiment of the present invention, the ceramic heating element ismatched with the smoking product bearing assembly, at least one part ofthe ceramic heating element is arranged in the cavity defined by thepreheating tube, which can achieve the effect of preheating the cavity,improves the heating efficiency and makes the heated flow air bake thesmoking product evenly to avoid cut tobacco waste of the smoking productand improve the smoke volume. Meanwhile, due to the fact that theceramic heating element adopts the high-purity aluminum oxide ceramicswhich have high compactness and almost have no pores in the microstructure, pollutants in fluids cannot enter the ceramic heating elementand thus cannot leave pollution or peculiar smell on the surface.Further, because the smoking product bearing assembly separates thesmoking product from the ceramic heating element completely, non-contactair heating is completely achieved to ensure that the product is notpolluted. In addition, the ceramic heating element adopts the porousarrangement, so that the specific surface area of the honeycomb ceramicbody is large enough to achieve sufficient heating of the air. Not onlythe heating efficiency is high, but also the ceramic heating body hashigh thermal conductivity, so that the aim of heating the air can beachieved more quickly. Further, the air flow speed is limited to someextent due to the structure of the porous channel, the contact timebetween the hot air and the smoking product is longer during baking ofthe smoking product, the heat loss is reduced, and the energy is saved.Moreover, when no smoking action is performed, the hot air can be lockedby means of the porous shape of the ceramic heating body, which reducesouter flow of the hot air and further saves the energy. In addition, thesmoking product placed in the cavity is separated from the ceramicheating element through the blocking piece, which prevents the ceramicheating element from being in direct contact with the smoking product orbeing too close to the smoking product to further prevent the part ofthe smoking product close to the ceramic heating element from beingheated to be over 320° C. and burnt. Further, due to the fact that thepreheating tube has the preheating effect, and at least one part of theceramic heating element is arranged in the cavity, the hot air heated bythe ceramic heating element bakes the smoking product effectively, thebaking efficiency is high, and the smoke volume is further improved. Inaddition, when the preheating tube adopts the ceramic tube, due to thefact that the ceramic tube has high surface compactness, adsorption ofthe smoke particles can be effectively prevented, and the effect ofpreventing peculiar smell can also be achieved.

As shown in FIG. 1 to FIG. 4, the embodiment of the present inventionfurther provides a non-contact air heating type heat-not-burn heatingdevice which comprises a heating assembly 1, a sealing sleeve 30 and aheat recovery device 3, wherein the side wall of the heat recoverydevice 3 is internally provided with a first cellular porous channel 31,and the first cellular porous channel 31 divides the heat recoverydevice 3 into an outer wall 32 and an inner wall 33; the inner wall 33of the heat recovery device 3 is provided with the sealing sleeve 30,the sealing sleeve 30 is internally provided with the heating assembly 1in the sleeve mode, and the heating assembly 1 is connected to the heatrecovery device 3 through the sealing sleeve 30; the heating assembly 1is internally provided with a heating body 11; and the heating body 11is provided with a heating circuit 12, the endpoints of the heatingcircuit 12 are provided with wires 13, and the heating body 11 isinternally provided with a second cellular porous channel 101.

Further, the heating assembly 1 is provided with a preheating tube 21, aflow deflector 22 and a heating element 20 sequentially from top tobottom, wherein the flow deflector 22 is provided with a plurality ofdeflector holes 202.

Further, the heating assembly 1 and the heat recovery device 3 are bothmade of the high-purity aluminum oxide ceramics with the density notless than 3.86 g/cm³.

Further, the first group of honeycomb porous channels 31 and the secondgroup of honeycomb porous channels 101 are uniformly arranged squareholes or other polygonal holes, with a pore diameter ranging from 0.1 mmto 2 mm, and the minimum distance between two adjacent holes within 0.1mm-0.5 mm

Further, printing materials of the heating circuit 12 comprise but notlimited to silver, tungsten and MoMn (molybdenum manganese).

Further, the wire 13 material includes but is not limited to silver,copper, and nickel. In the embodiment, as shown in FIG. 1, the side wallof the heat recovery device 3 is internally provided with the firstcellular porous channel 31, and the first cellular porous channel 31divides the heat recovery device 3 into the outer wall 32 and the innerwall 33; the inner wall 33 of the heat recovery device 3 is providedwith the sealing sleeve 30, the sealing sleeve 30 is internally providedwith the heating assembly 1 in the sleeve mode, and the heating assembly1 is connected to the heat recovery device 3 through the sealing sleeve30; and the heating assembly 1 is internally provided with thepreheating tube 21, the flow deflector 22 and the heating body 11sequentially from top to bottom, as shown in FIG. 2, the heating body 11is provided with the heating circuit 12, the endpoints of the heatingcircuit 12 are provided with the wires 13, and the heating body 11 isinternally provided with the second cellular porous channel 101. Whenneeding to smoke, the user places the smoking product (like thecartridge) into the preheating tube 21 to prevent the cartridge fromfalling off, and the heating circuit 12 starts to heat after powered on.Only after the cartridge is baked at 280° C-320° C., the effectiveingredients like the nicotine can be emitted, that is, the smoke forsmoking can be produced, so the device needs to be preheated. Thepreheating is completed after the temperature of the preheating tube 21and the flow deflector 22 reaches 200° C. Due to the fact that thepreheating has completed, the cartridge only needs to be heated from200° C. to 320° C. during the first and second smoking, that is, thefirst heating, more quickly than temperature increase from the roomtemperature, and the smoke volume and the first and second smoking canbe further ensured. In order to achieve rapid heating, the heating body11 is internally provided with the second cellular porous channel 101,and the porous channel is provided with the square holes or otherpolygonal holes evenly distributed with the hole diameter range of 0.1-2mm and the minimum distance between two adjacent holes of 0.1-0.5 mm.The expansion area is large, so the air heating efficiency is very high.In addition, the hot air flows through the honeycomb center withoutcontact with the heating circuit 12, and no pollution will be caused.Meanwhile, the heating assembly 1 and the heat recovery device 3 areboth made of the high-purity aluminum oxide ceramics with goodinsulation, high strength and good thermal conductivity, therefore, theheating element 20 has no electric leakage during heating, and thepreheating tube 21 and the flow deflector 22 can be rapidly heated dueto good thermal conductivity of the high-purity aluminum oxide ceramics,and the user does not have to wait long to smoke the cartridge. When theuser smokes the cartridge, the airflow is heated to 320° C. through theheating element 20 and then passes through the deflector holes 202 inthe flow deflector 22 to be further homogenized and shunted to flow intothe cartridge more evenly to heat the cut tobacco to improve the smokevolume. In the heating process, all the heat not acting on the cartridgewill be recovered. Due to the fact that the inner wall 33 of the heatrecovery device 3 is provided with the sealing sleeve 30, and thesealing sleeve 30 is internally provided with the heating assembly 1 inthe sleeve mode, the heat produced by the heating assembly 1 and notacting on the cartridge will be transferred to the first cellular porouschannel 31. In addition, the porous channel is provided with the squareholes or other polygonal holes evenly distributed with the hole diameterrange of 0.1-2 mm and the minimum distance between two adjacent holes of0.1-0.5 mm, the expansion area is large, so the heating efficiency isvery high, the thermal insulation effect can be achieved, and the energysaving can be achieved by reducing the heating time. During the smokingprocess, the heated air flows to the second cellular porous channel 101,the air flows into the heat recovery device 3 to further take away theheat in the first cellular porous channel 31 to achieve heat recovery.The sealing sleeve 30 achieves the sealing effect between the heatrecovery device 3 and the heating assembly 1, ensuring that the hot airdoes not flow to other places. During smoking, some fluid contaminantsemitted from the cartridge may inevitably remain in the device. As thehigh-purity alumina ceramics feature high density (not less than 3.86g/cm³) and almost have no pores in microstructure, so penetration ofcontaminants in smoke is impossible, and no pollution and odd smell willbe left on the surface;

In the description of the present invention, it should be understoodthat orientation or position relationships indicated by terms “center”,“longitudinal”, “transverse”, “length”, “width”, “thickness”, “upper”,“lower”, “front”, “rear”, “left”, “right”, “vertical”, “horizontal”,“top”, “bottom”, “inner”, “outer”, “clockwise”, “counterclockwise” etc.are orientation or position relationships as shown in the drawings, andthese terms are just utilized to facilitate description of the presentinvention and simplify the description, but not to indicate or implythat the mentioned device or component must have a specific orientationand must be established and operated in a specific orientation, andthus, these terms cannot be understood as a limitation to the presentinvention.

In addition, the terms “first” and “second” are used only for thepurpose of description and are not intended to indicate or implyrelative importance or imply the number of technical characteristicsindicated. Thus, a characteristic defined by “first” and “second” cancomprise one or a plurality of characteristics explicitly or implicitly.In the description of the present invention, “a plurality of” means twoor more, unless otherwise expressly and specifically defined.

In the present invention, unless otherwise specified and defined, theterms “installed”, “connected”, “connected with” and “fixed” should becomprehended in a broad sense. For example, these terms may becomprehended as being fixedly connected, detachably connected orintegrally connected; mechanically connected or electrically connected;directly connected or indirectly connected through an intermediatemedium, and in an internal communication between two components or in aninteractive relationship between two components. A person of ordinaryskill in the art may understand specific meanings of the foregoing termsin the present invention according to specific situations.

In the present invention, unless otherwise specified and defined, theexpression that a first characteristic is “above” or “below” a secondcharacteristic may include that the first characteristic and the secondcharacteristic are in direct contact and may also include that the firstcharacteristic and the second characteristic are not in direct contactbut in contact through an additional characteristic between them.Furthermore, the expression that the first characteristic is “over”,“above” and “on” the second characteristic includes that the firstcharacteristic is right above or at the inclined top of the secondcharacteristic, or just means that the level of the first characteristicis higher than that of the second characteristic. The expression thatthe first characteristic is “under”, “below” and “beneath” the secondcharacteristic includes that the first characteristic is under or at theinclined bottom of the second characteristic, or just means that thelevel of the first characteristic is lower than that of the secondcharacteristic.

In the description of the specification, description of the referenceterms “an embodiment”, “some embodiments”, “example”, “specific example”or “some examples” means that specific characteristics, structures,materials or features described in combination with the embodiment orthe example are included in at least one embodiment or example of thepresent invention. In the specification, indicative expression of theabove terms should not be understood as being necessarily specific tothe same embodiment or example. Furthermore, the specificcharacteristics, the structures, the materials or the features describedmay be combined in the appropriate mode in any one or more embodimentsor examples. In addition, those skilled in the art may connect andcombine different embodiments or examples described in thespecification.

Although the embodiments of the present invention have been shown anddescribed above, it can be understood that the embodiments are exemplarybut should not be construed as a limitation on the present invention,the ordinary technician skilled in the art may make changes,modifications, substitutions and variations of the embodiments withinthe scope of the present invention.

What is claimed is:
 1. A non-contact heat-not-burn heating device,comprising a ceramic heating element and a smoking product bearingassembly, wherein the ceramic heating element comprises a heating bodyand a heating circuit, wherein the heating body is cylindrical andinternally provided with a porous channel, and the heating circuit isarranged on the heating body to heat air passing through the porouschannel; and the smoking product bearing assembly comprises a preheatingtube and a blocking piece, wherein the blocking piece is arranged in acavity defined by the preheating tube to divide the cavity into a firstcavity and a second cavity; wherein the first cavity is used for placinga smoking product and preheating the smoking product, and the secondcavity is used for placing at least one part of the ceramic heatingelement.
 2. The non-contact heat-not-burn heating device according toclaim 1, wherein the blocking piece is a flow deflector located in thecavity along a wall of the preheating tube, and the flow deflector isprovided with a plurality of deflector holes.
 3. The non-contactheat-not-burn heating device according to claim 2, wherein the pluralityof deflector holes are evenly distributed in a peripheral direction, andthe plurality of deflector holes are round holes with a hole diameter of0.1-2 mm.
 4. The non-contact heat-not-burn heating device according toclaim 1, wherein the blocking piece forms a step surface extending alonga wall of the preheating tube to a center of the preheating tube.
 5. Thenon-contact heat-not-burn heating device according to claim 1, whereinthe heating body is a cylinder, and the porous channel is arranged inthe heating body in an axial direction.
 6. The non-contact heat-not-burnheating device according to claim 1, wherein the heating circuit isprinted on an outer surface of the heating body in a thick film circuitmode.
 7. The non-contact heat-not-burn heating device according to claim1, wherein the preheating tube is a ceramic tube, and the heating bodyand the ceramic tube are both made of one material selected from thegroup consisting of aluminum oxide ceramics, aluminum nitride ceramics,silicon nitride ceramics, silicon carbide ceramics, beryllium oxideceramics, and zirconium oxide ceramics.
 8. The non-contact heat-not-burnheating device according to claim 7, wherein an aluminum oxide contentin the aluminum oxide ceramics is greater than 99%, and a density of thealuminum oxide ceramics is not less than 3.86 g/cm³.
 9. The non-contactheat-not-burn heating device according to claim 1, further comprising asealing sleeve, wherein the sealing sleeve is arranged in a hollow modeto sleeve the smoking product bearing assembly inside, and a bottom ofthe sealing sleeve extends out in an axial direction to form acondensation cavity.
 10. The non-contact heat-not-burn heating deviceaccording to claim 9, wherein the sealing sleeve is a glass tube, and apreset distance is kept between the bottom of the sealing sleeve and theceramic heating element.
 11. The non-contact heat-not-burn heatingdevice according to claim 9, wherein the bottom of the sealing sleeve isprovided with a detachable protective net cover.
 12. The non-contactheat-not-burn heating device according to claim 9, further comprising anadsorbate, wherein the adsorbate is arranged in the condensation cavityto adsorb tar produced during heating of the smoking product.
 13. Thenon-contact heat-not-burn heating device according to claim 1, furthercomprising a sealing sleeve, wherein the sealing sleeve is arranged in ahollow mode to sleeve the smoking product bearing assembly inside, aninner diameter of the sealing sleeve is greater than an outer diameterof the smoking product bearing assembly, and the sealing sleeve and thesmoking product bearing assembly are fixed in a point contact mode. 14.The non-contact heat-not-burn heating device according to claim 13,wherein the sealing sleeve and the smoking product bearing assembly aresubjected to point contact fixing by adopting a heat insulationadhesive.
 15. The non-contact heat-not-burn heating device according toclaim 13, wherein the sealing sleeve comprises a first glass tube and asecond glass tube, an inner diameter of the first glass tube is greaterthan an outer diameter of the second glass tube to sleeve the secondglass tube inside the first glass tube, and the second glass tube andthe first glass tube are fixed in the point contact mode.
 16. Thenon-contact heat-not-burn heating device according to claim 15, whereina position of point contact between the second glass tube and thesmoking product bearing assembly is located on an upper portion of thesecond glass tube, and a position of point contact between the secondglass tube and the first glass tube is located on a lower portion of thesecond glass tube.
 17. The non-contact heat-not-burn heating deviceaccording to claim 2, wherein the heating body is a cylinder, and theporous channel is arranged in the heating body in an axial direction.18. The non-contact heat-not-burn heating device according to claim 3,wherein the heating body is a cylinder, and the porous channel isarranged in the heating body in an axial direction.
 19. The non-contactheat-not-burn heating device according to claim 4, wherein the heatingbody is a cylinder, and the porous channel is arranged in the heatingbody in an axial direction.
 20. The non-contact heat-not-burn heatingdevice according to claim 10, further comprising an adsorbate, whereinthe adsorbate is arranged in the condensation cavity to adsorb tarproduced during heating of the smoking product.